In-game description

Miracle of those chosen by the Sunlight covenant.Temporarily boosts attack and damage absorption for self and those in the vicinity.

This is the tale of the Sun's firstborn, his faithful first knight, and the brave dragonslayer who served them both.

Effect

In PvE, reduces damage taken by 10% and increases damage dealt by 10%.

In PvP, reduces damage taken by ~1% and increases damage dealt by ~5%, which renders it twice as effective at increasing damage as Oath of Sunlight, which is only 2.5%. Many similar effects are scaled down in PvP this way.